RX400h

I have not done this, myself but found this answer by doing a quick search using Bing's CoPilot:

Did you contact the parts department person at the dealership? Or try one or more Lexus OEM parts sites, such as: https://parts.lexus.com/ https://lexuspartsnow.com https://lexusoeparts.com

I'm not sure if this description is perfectly accurate, but it may be worth a try/look:

You should try one or more of these online sites: https://parts.lexus.com/ https://lexus.oempartsonline.com/ Genuine OEM Lexus Parts and Accessories Online - Lexus Parts Now

Perhaps it is related to the seatbelt connection or door that is not fully closed, although I would think that either of these would result in an illuminated symbol. I would check the seat belt and door switch.

Great. Patience/persistence is the key!

Hello, Dan. Have you looked at a video such as this one?

Yes, after replacing the battery in your 2016 Lexus RX350, you will need to perform a reset to ensure all systems are functioning optimally. Here are the steps to reset your Lexus after replacing the battery: Turn Off the Ignition and Disconnect the Negative Terminal: Before you start, make sure the ignition is turned off. Then, disconnect the negative terminal of the battery1. Wait for 15 Minutes: Allow the vehicle’s systems to reset by waiting for about 15 minutes. Reconnect the Negative Terminal and Turn On the Ignition: After waiting, reconnect the negative terminal and turn on the ignition1. Reset Specific Functions: Follow the on-screen prompts to reset specific functions. This includes resetting the clock and date settings, power windows and sunroof, and the audio and navigation systems. Test the Functionality of Your Lexus After Resetting: After you’ve completed the reset, test the functionality of your Lexus to ensure everything is working properly. Please note that each window has to be reset individually. To do this, start the vehicle and roll each window down and hold for second. Also, all your radio presets will be lost and you will have to re-enter all. If you experience any issues with the functionality of your Lexus after resetting, troubleshooting options are available for common issues during the resetting process. A comprehensive test drive helps identify and address any remaining issues.

Traction control can come in handy under the following conditions: Heavy Rain, Snow, or Icy Conditions: Traction control is essential in situations such as heavy rain, snow, or icy roads, significantly improving safety. It helps prevent your car from losing traction, hydroplaning, or potentially crashing. Navigating Curves in Adverse Weather or Making Sharp Turns on Unstable Surfaces: It proves particularly valuable when navigating curves in adverse weather or making sharp turns on unstable surfaces. Driving on Slippery or Uneven Roads: Traction control should be on for most driving conditions, especially slippery or uneven roads. Sometimes a no-start (no crank) conditions indicates that the starter is failing. If the odometer is broken, how can you know for certain how many miles have been driven?

What year is your RX 350? By the way, I've found that Apple is seldom "state of the art". They still do not have an intelligent stylus. and their photo abilities are almost always a year behind that of Samsung. Perhaps it's good that Toyota/Lexus does not imitate Apple.😏

This vehicle does use a cartridge-style filter, as seen in the link, above.